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Praseodymium doped ceria: Model mixed ionic electronic conductor with coupled electrical, optical, mechanical and chemical properties
Praseodymium doped ceria, PrxCe1−xO2−δ (PCO), exhibits many interesting and unusual properties including a pO2 dependent ionic conductivity, an anomalously large thermal expansion coefficient in air, and a significant electronic conductivity component at elevated pO2. These unusual features are disc...
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| Published in: | Solid state ionics 2012-10, Vol.225, p.194-197 |
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| Main Authors: | , , , , , |
| Format: | Article |
| Language: | English |
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| container_end_page | 197 |
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| container_start_page | 194 |
| container_title | Solid state ionics |
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| creator | Tuller, H.L. Bishop, S.R. Chen, D. Kuru, Y. Kim, J.-J. Stefanik, T.S. |
| description | Praseodymium doped ceria, PrxCe1−xO2−δ (PCO), exhibits many interesting and unusual properties including a pO2 dependent ionic conductivity, an anomalously large thermal expansion coefficient in air, and a significant electronic conductivity component at elevated pO2. These unusual features are discussed in terms of the variable valent nature of Pr at elevated pO2, its position within the ceria band gap and the creation of an impurity band supporting small polaron transport. Implications for use of PCO as a ceria solid electrolyte compatible cathode, stress induced chemical expansion and optically detected redox kinetics are analyzed and discussed.
► Summary of optical, electrical, and mechanical properties of Pr doped ceria. ► Mixed conductivity in SOFC cathode conditions from Pr. ► Optical absorption from impurity band allows kinetics monitoring. ► Chemical expansion from nonstoichiometry results in large effective thermal expansion. |
| doi_str_mv | 10.1016/j.ssi.2012.02.029 |
| format | article |
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► Summary of optical, electrical, and mechanical properties of Pr doped ceria. ► Mixed conductivity in SOFC cathode conditions from Pr. ► Optical absorption from impurity band allows kinetics monitoring. ► Chemical expansion from nonstoichiometry results in large effective thermal expansion.</abstract><pub>Elsevier B.V</pub><doi>10.1016/j.ssi.2012.02.029</doi><tpages>4</tpages><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0167-2738 |
| ispartof | Solid state ionics, 2012-10, Vol.225, p.194-197 |
| issn | 0167-2738 1872-7689 |
| language | eng |
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| source | ScienceDirect Freedom Collection 2022-2024 |
| subjects | Cathode Cerium oxide Chemical expansion Conductors (devices) Electronics Elevated Mixed conductor Nonstoichiometry Optical absorption Praseodymium Resistivity SOFC Solid electrolytes Thermal expansion |
| title | Praseodymium doped ceria: Model mixed ionic electronic conductor with coupled electrical, optical, mechanical and chemical properties |
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